6. Perform two linear regressions. ( Please do not copy and paste answer from someone else it is wrong, when you answer the problem do not use a picture from phone insert the tables directly if possible or try to photo-shop it in here)

1. In the first regression use periods 1 to 40 to build the trend line equation. Then forecast sales for periods 41 to 50. Plot the forecast and actual data overlaid.

2. Provide MAD and MAPE.

3. In the first regression use periods 20 to 40 to build the trend line equation. Then forecast sales for periods 41 to 50. Plot the forecast and actual data overlaid.

4. Provide MAD and MAPE.

5. Analyze: how did the two regression forecasts compare? Which one is better? Why?

6. Month Name	Month Number	Sales(thousand $)
   Jan	1	53
   Feb	2	39
   Mar	3	37
   Apr	4	55
   May	5	47
   Jun	6	55
   Jul	7	47
   Aug	8	43
   Sep	9	45
   Oct	10	47
   Nov	11	45
   Dec	12	100
   Jan	13	73
   Feb	14	55
   Mar	15	47
   Apr	16	55
   May	17	47
   Jun	18	43
   Jul	19	45
   Aug	20	40
   Sep	21	23
   Oct	22	33
   Nov	23	31
   Dec	24	44
   Jan	25	40
   Feb	26	46
   Mar	27	50
   Apr	28	51
   May	29	48
   Jun	30	87
   Jul	31	90
   Aug	32	131
   Sep	33	139
   Oct	34	144
   Nov	35	138
   Dec	36	127
   Jan	37	177
   Feb	38	194
   Mar	39	192
   Apr	40	172
   May	41	201
   Jun	42	214
   Jul	43	215
   Aug	44	199
   Sep	45	229
   Oct	46	250
   Nov	47	233
   Dec	48	234
   Jan	49	256
   Feb	50	280